Nantou City (Chinese: 南投市) is a county-controlled city located in the northwest of Nantou County, Taiwan. It lies between the Bagua Mountains and the Maoluo River and is the county seat of Nantou County. Freeway No. 3 serves Nantou City. Its name is a transliteration of the Hoanya word Ramtau with its first character (南; "south") chosen to complement that of Beitou's (北; "north"), a district in Taipei, even though there is no relation between the aboriginal names.